A method for producing methyl methacrylate including: a distillation step including: supplying a reaction solution, which is obtained by subjecting methacrolein, methanol, and molecular oxygen to oxidative esterification in an oxidative esterification reactor and which contains the methyl methacrylate as a reaction product, to a first distillation column located at downstream of the oxidative esterification reactor, extracting a fraction containing the methacrolein and the methanol from a medium section of the first distillation column, and extracting a column bottom liquid containing the methyl methacrylate from a column bottom of the first distillation column, wherein a concentration of the methanol in the column bottom liquid is 1% by mass or more and 30% by mass or less.

A method for producing methyl methacrylate including: a distillation step including: supplying a reaction solution, which is obtained by subjecting methacrolein, methanol, and molecular oxygen to oxidative esterification in an oxidative esterification reactor and which contains the methyl methacrylate as a reaction product, to a first distillation column located at downstream of the oxidative esterification reactor, extracting a fraction containing the methacrolein and the methanol from a medium section of the first distillation column, and extracting a column bottom liquid containing the methyl methacrylate from a column bottom of the first distillation column, wherein a concentration of the methanol in the column bottom liquid is 1% by mass or more and 30% by mass or less.

Methods for removing water and/or dissolved and solid contaminants from a liquid hydrocarbon such as condensate flowing through a fractionating column are disclosed. Pressure within the column and temperature at which the reboiler operates are observed to prevent boiling of the contaminated hydrocarbon thus obviating contaminant deposition on heated surfaces. Further methods directed to column operation and anti-fouling procedures augment the core method. Apparatus to effect the methods is also provided.

Methods for removing water and/or dissolved and solid contaminants from a liquid hydrocarbon such as condensate flowing through a fractionating column are disclosed. Pressure within the column and temperature at which the reboiler operates are observed to prevent boiling of the contaminated hydrocarbon thus obviating contaminant deposition on heated surfaces. Further methods directed to column operation and anti-fouling procedures augment the core method. Apparatus to effect the methods is also provided.

The quick response system and method for removing volatile compounds from contaminated water disclosed herein may comprise, at least, a preconditioning stage, a stripping stage, a condenser stage, a refrigeration stage, and a scrubber stage. The present invention relates to a portable system and method that can be deployed on an emergency or quick response basis to purify aqueous streams containing volatile organic compounds (VOC) and chlorinated hydrocarbons, collectively volatile compounds (VC), emitted from petroleum and chemical processing facilities. The system allows manufacturing facilities having internal cleanup issues to become compliant with environmental standards and guidelines quickly. Once the issues in the petroleum facility are fixed, this method can be demobilized and removed from the site in a short period of time.

In accordance with one or more embodiments of the present disclosure, a computer-controlled programmable logic controller (PLC) extraction system for separating an extract from a biomass includes a PLC, a solvent reservoir comprising a solvent that is a gas when the solvent is at a temperature of 25 C. and atmospheric pressure, a plurality of extraction devices comprising the biomass, an extract collection reservoir for collecting the extract, a solvent recovery system, and a temperature controlled circulation system. The circulation system fluidly connects the solvent reservoir, the plurality of extraction devices, the extract collection reservoir, and the solvent recovery system and comprises at least one apparatus for controlling a flow of the solvent. The solvent comprises no more than 1 weight % CO.sub.2. A method of extracting an extract from a biomass using a PLC extraction system is also described.

This disclosure concerns a system for purifying contaminated water and a method for using the system. More specifically, the invention concerns removing contaminants, such as those introduced by fracking, from a contaminated water.

The system and methods described are directed to a distillation system and method having an evaporator tank with a wall surrounding an interior evaporator tank area. A non-oxidizing gas line is disposed at least partially outside the evaporator tank in communication with the interior evaporator tank area, wherein the non-oxidizing gas line introduces a non-oxidizing gas into the interior evaporator tank; the interior evaporator tank area is generally at or above an ambient atmospheric pressure.

Provided is a method of preparing sulfonated aryl phosphine, the method capable of preparing sulfonated aryl phosphine with high purity and high yield by efficiently removing sulfur trioxide generated during preparing sulfonated aryl phosphine using an extractant.

The present invention relates to an intensification of the synthetic process for the preparation of dialkyl ether from alcohol by using a conical fixed bed reactor integrated with distillation coupled conical polishing reactor.